LONDON, ENGLAND - JULY 15:  Ellie and Maria react after losing a battle while playing Pokemon Go, a mobile game that has become a global phenomenon, the day after it's  UK release on July 15, 2016 in Piccadilly Circus, London, England. The app lets players roam using their phone's GPS location data and catch Pokemon to train and battle.The game has added millions to the value of Nintendo, which part-owns the franchise.(Photo by Olivia Harris/Getty Images)